Electrical socket



M y 11,- 1943. A. w. KMBEU. 2,318,865

ELECTRICAL SOCKET Filed' Oct. 11, 1940 12 Sheets-Sheet l Flea;

INVENTOR:

ARTHUR W. KIMBELL,

By 962A 338A, ATTY.

y 9 7 A. WQKl MBELL 23 ELECTRICAL SOCKET Filed 001;. 11, 1940 2Sheets-Sheet 2 FIGJA.

INVENTQR:

ART UR Kama ELL. by Jwld. Y ATT'Y;

Patented May 11, 1943 ELECTRICAL SOCKET Arthur W. Kimbell, West Newton,Mass., assignor to United-Carr Fastener Corporation, Cambridge, Mass., acorporation of Massachusetts Application October 11, 1940, Serial No.360,784

- 7 Claims. (01.173-328) This invention relates to improvements inelectrical sockets and more particularly to sockets for vacuum tubes forradio sets and the like.

One of the objects of this invention is the prosharp edges becomeembedded in the supporting member during the operation by which thesaddle is attached to the supporting member, thereby assuring a goodelectrical connection.

A still further object is directed to a method I eliminatingmicrophonics in the tube, which includes the provision of aileiriblemetal ring, 'secured to the socket and a supporting panelbetween the parts and constructed to yield toward and away from thesupporting panel so as to absorb the impact shocks which a portablereceiver particularly might be subjected to during operation.

Other objects and uses of my invention will be apparent from inspectionof the drawings and specification hereinbelow set forth.

Referring to the drawings, in which I have illustrated preferredembodiments "of my invention- Fig. 1 represents a bottom plan of asocket installation including a supporting panel and a socket membercarrying my improved saddle member and secured in shockproof relation tothe panel by a ring member;

Fig. 2 is a top plan of the installation shown in Fig. 1;

Fig. 3 is a sectional view taken along the line 3-3 of Fig. 1;

Fig. 4 is a plan of the ring member which serves to effect a shockprooimounting between the socket and panel members;

Fig. 5 is a side elevation of the ring member shown in Fi 4;.

Fig. 6 is a-section taken along the line 68 of Fig. 3, the supportingpanel and ring being omitted;

Fig. '7 is an enlarged partial section taken along the line 'i-i ofFigs. 1 and 6, the supporting panel and ring being omitted;

Fig. -8 is a bottom plan of a socket installaon similar to that shown inFig. the saddle member Fig. 9 is a bottom plan view of a socketinstallation similar to Fig. 1 but omitting the ring member;

Fig. 10 is a section taken on the line iii-ill of Fig. 8;

Fig.11 is a section taken on the line Ii-li of Fi 9;

Fig. 12 is a section taken on the line i2-i2 of Fig. 11;

' Fig. 13 is a section taken on the line i3-l3 of Fig. 12; j

Fig. 14 is an enlarged section taken on the line ll-lii of Fig. 12; and4 Fig. 15 is an enlarged section taken on the line iii-l5 of Fig. 9.

Referring to my first form of socket installation illustrated in Figs.1-3 of the drawings,

1 but omitting I-have shown a socket member i having a metal saddle ormounting member 2 and a ring member 3 attached to the mounting memberand also to a metal supporting panel 4 so ,as to secure the socketmember in shock-proof relation to the panel. The panel 4 has an aperture5 for receiving a base of a vacuum tube member (not shown) when the tubeand socket are electrically connected.

Referring in detail to the socket member, I have shown one having aninsulating base which in my preferred form comprises an upper plate 6and a lower plate 1 formed of suitable insulating material, the plates 6and I having registering central apertures 8-8 (Figs. 3 and 7). Theupper plate has an annular series of prong-receiving apertures 9disposed around its respecwithin the apertures iii of the plate i andintegral soldering terminals i2 extending through the plate. The upperplate 6 preferably has a slot 13 (Figs. 2 and '7) extending radiallyfrom the aperture 8 thereof for a purpose to be described.

The saddle or mounting member 2 is formed entirely from one piece ofsheet metal material and includes a flat plate portion it. having anopening i5 01' greater diameter than the imaginary circle defined by theopenings 9 of the insulating plate ii. EFlatmounting portions or wingsi6 are provided at opposed ends of the plate it having openings ii, forreceiving suitable attaching members such as the rivets l8. In mypreferred construction of the mounting member 2 a number of slits N areformedin the wings l8 extending radially from the respective openings l1and defining a number 'of lugs 20. The lugs 28 are bent upwardly out ofthe plane of the plate l4 so as to present sharp edges 2| (Figs. 14 and15) which are adapted to be embedded in the material of the ring member2 or be pressed firmly thereasainst so as to effect a good electricalconnection between the parts. The mounting member 2 has a shieldingmeans drawn from material taken from within the opening I! of the plateI4. The shielding means is preferably in the form of a cup 22 whichextends concentric with the axis of the plate 14. The cup 22 has anannular series of ears 23 adjacent its open end and the cup is connectedto the plate l4 by a narrow connecting portion 24 which is joinedintegrally to the cup a predetermined distance from the outermost freeedges of the open end, as most clearly shown in Fig. '7.

In assembling the parts of the socket base and retainer, the socketcontacts are disposed in assembly with the insulating plate I and theinsulating plate 6 is superposed upon the plate I with its openings 9 inalignment with its openings ID. The mounting member 2 is then movedtoward the base to extend the cup 22 through the aligned openings 8--8of insulating plates 6 and I. At the same time the plate l4 of themounting member engages the outer surface of the insulating plate 8 andthe connecting portion is disposed within the slot i3 of the plate 8, asmost clearly shown in Fig. 7. The parts are secircular portions 3| ofthe ring between the attaching portions 28 are deformed out of the planeof the portions 28 to one side thereof and provide a second pair ofdiametrically opposed attaching portions 22 disposed in a plane spacedfrom the portions 20. The ring member is secured to the mounting member2 by means of the rivets I8 which extend through the openings ll of thewings I8 and openings 23 (Fig. 4) formed in the attaching portions 32.The entire socket unit including the ring member is secured to the panel4 by any suitable means such as cured in assembly by means of lugs 25integral with the marginal edges of they plate portion i4 and havingstraight portions 26 extending outwardly from the plate portion toengage the peripheral edges of the plates and free ends 21 which arebent over against the outer surface of the lower insulating plate 1(Figs. 1 and 7), thereby maintaining the plates 6 and 1 in fixedrelation between the plate i4 and lug ends 21. The insulating plates 6and I have notches 28 in their peripheral edges which receive thestraight portions 26 and the walls of the plates 8 and 1 adjacent thenotches cooperate with the straight portions 26 to prevent relativerotation of the parts. The cup 22 is secured against movement axially.of the openings 8-8 by means 'of a positioning washer 29 of suitableinsulating material which is passed over the open end of the cup 22 soas abut the connecting portion 24. The ears 23 of the cup 22 are thenclenched over to engage the washer and the parts are fixed againstrelative movement.

It will be seen that when the parts of the socket have been finallyassembled, the cup 22 extends slightly beyond the length of thesoldering lugs l2 in interposed relation to the plate and grid contactsand as a result a low grid-toplate capacitance is maintained. By joiningthe cup 22 integrally to the plate I4 by the connecting portion 24 anuninterrupted electrical continuity is provided between the cup andplate portion thereby effecting a relatively low ground discharge loss.Furthermore. the cup 22 may present a predetermined inside diameterenabling it to receive and clear the glass envelope seal (not shown)which protrudes from the base of the most recently developed glassvacuum tube.

The ring membr 3 is a one-piece sheet metal spring stamping and providesa pair of diametrically opposed flat attaching portions 30. Semirivets34 which extend through openings 25 (Fig. 4) of the attaching portions'30 and the supporting panel. The cup 22 is thus grounded to thesupporting panel 4 through the mounting member 2 and the ring member 2.As a result of the construction of the ring member, the semicircularportions 2! thereof between the attaching portions 28 yield toward andaway from the panel 4 so as to absorb impact shocks to which a portablereceiver and the like might be subjected, thereby eliminatingmicrophonics in the tubes.

The socket installations shown in Figs. 8 and 10 and 9 and 11respectively are modifications of the installation shown in Figs. l-3and like parts of the various installations carry the same identifyingnumbers. The contacts have been omitted from the illustrations of theselast forms, but it is understood that any suitable type might beassembled with these socket bases. The installation shown in Figs. 8 and10 diilers primarily from the installation of Figs. 1-3 by the fact thatthe mounting member has been omitted and the ring member 3, which servesto secure the socket base in shockproof relation to the supporting panel4. is secured directly to the insulating plates 8 and I by attachingmembers such as the rivets l8 which extend through the plates 6 and Iand the attaching portions 32 of the ring member. Shielding of thecontacts in this form of installation is performed by a cupshaped unit36 which is secured in assembly with the plates 8 and I and whichextends through aligned central openings of the plates in the manner ofthe integral cup portion 22 of the mounting member 2. grounded to thepanel 4 by a lead-off wire.

My third form of installation shown in Figs. 9 and 11 diflers from theinstallation of Figs. 1-3 by the fact that the ring member 3 is omittedand the mounting member 2 is secured directly to the panel 4 byattaching members such as the rivets 31 extending through openings i! ofthe wing portions l6 and the panel. During the operation by which themounting member is secured to the panel, the blow which heads over therivets 31 causes the edges 2i of the ears 20 to embed themselves in thepanel, as most clearly shown in Fig. 15, so as to assure a goodelectrical connection between the mounting member and supporting panel.

Although I have illustrated and described preferred embodiments of myinvention, I do not wish to be limited thereby as the scope of myinvention is best set forth in the following claims.

I claim:

1. In combination with a sheet metal SUDDOIi, of an electrical socketdevice comprising an insulating base carrying a plurality of contactmembars, a one-piece sheet metal mounting member assembled with saidbase having mounting portions disposed laterally of said base andadapted to be secured to said support so as to be elec- The cup 38 maybe trically engaged therewith, said mounting member including anintegral tubular seal-receivin shielding means extending into andaxially through said base and disposed between two of said contactmembers and a bridge portion integrally 'joining said shielding meansand said mounting member.

2. In combination with a sheet metal support, of an electrical socketdevice comprising an insulating base carrying a plurality of contactmembers, a one-piece sheet metal mounting member assembled with said:base adapted to be secured to said support so as to be electricallyengaged therewith, said mounting member having an integral cylindricalseal-receiving shielding means extending into and axially through saidbase and disposed between two of said contact members and a portionintegrally joining said shielding means and said mounting member.

3. In combination with a sheet metal support, of an electrical socketdevice comprising an insulating base carrying a plurality of contactmembers, a one-piece sheet metal mountin member assembled with saidbase, said mounting member including a body portion having an opening,integral attaching portions engaging said base for securing saidmounting member thereto, said body portion having flat mounting portionson opposed sides extending laterally beyond said base for attachment tosaid support so as to be electrically engaged therewith, and saidmounting member having a cylindrical hollow shielding means within theopening of said body portion, and extending into said base and disposedbetween two of said contact-members, and a bridge portion integrallyjoining said shielding means andsaid mounting member.

4. An electrical socket device comprising an insulating base having anannular series of openings extending through said base, a plurality ofcontacts carried by said base within said openings, a one-piece sheetmetal mounting member assembled with said base, said mounting memberincluding a body portion having an opening in alignment with and ofgreater diameter than said annular series of openings, said mountingmember having an integral tubular shielding means extending axiallythrough said base and disposed between a pair of said contacts.

5. In combination with a sheet metal support, of an electrical socketdevice comprising an insulating base having upper and lower sides and anannular series of openings extending through.

said base, a plurality of contacts carried by said base within saidopenings, 9. metal mounting member assembled with said base and attachedto said support, said mounting'member includin a flat plate portiondisposed adjacent the upper side of said base and having an opening inalignment with and of greater diameter than said annular series ofopenings, attaching portions integral with said plate portion andengaging an oppositely facing side of said base from said top side forsecuring said mounting member to said base, said mounting member havinga shielding means disposed axially ofthe opening of said plate portionand extending through said base and disposed between two of said contactmembers, and a portion integrally joining said shielding means and saidmounting member.

6. In combination with a sheet. metal support, of an electrical socketdevice comprising an insulating base having a central opening extendingtherethrough and an annular series of openings around said centralopening extending through said base, a plurality of contacts carried bysaid base within'said openings of said annular series, a one-piece sheetmetal mounting assembled with said base and attached to said support,said mounting member including a body portion disposed adjacent one sideof said base and having an opening in alignment with and of greaterdiameter than said annular series of openings, said mounting memberhaving a tubular shielding means forming an integral part thereof, saidshielding means extending through said central opening of said base anda bridge portion integrally joining said shielding means to said bodyportion. I

7. An electrical socket device comprising an insulating base havingsuperposed disks, said disks havingaligned central openings and alignedseries of annular openings around said central openings, a plurality ofcontacts carried by said base within said openings of at least one ofsaid annular series, a one-piece sheet metal mounting member assembledwith said base, said mounting member including a plate portion engagingthe outer 'face of one of said disks and attaching lugs integral withsaid plate engaging the periphery of said disks to secure said disks inassembly, said plate having an opening in alignment with and of greaterdiameter than said annular series of openings, a tubular shieldingmember forming an integral part of said mounting member extendingthrough said central openings of said disks, and a bridge portionextending partly across the opening in said plate and in tegrallyjoining said shielding member to said plate portion.

ARTHUR W. KIMBELL.

